{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{6}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         \\
\midrule
\midrule
Sample mean         &      0.3799         &      0.3793         &      0.3946         &      0.4215         &      0.4173         &      0.4215         \\
Sample standard deviation&    (0.2509)         &    (0.2552)         &    (0.2559)         &    (0.2660)         &    (0.2751)         &    (0.2806)         \\
\midrule\multicolumn{4}{l}{\textit{Panel A: Average hydrocortisone effect$^a$}} \\ \quad Hydrocortisone effect&     -0.0126         &-0.0158$^{**}$         &     -0.0104         &     -0.0088         &     -0.0070         &     -0.0088         \\
                    &    (0.0084)         &    (0.0079)         &    (0.0078)         &    (0.0067)         &    (0.0071)         &    (0.0067)         \\
\midrule \multicolumn{4}{l}{\textit{Panel B: Average Coethnicity effect$^b$}} \\ \quad Coethnicity effect&0.0081$^{***}$         &0.0167$^{***}$         &0.0135$^{***}$         &0.0309$^{***}$         &0.0223$^{***}$         &0.0309$^{***}$         \\
                    &    (0.0018)         &    (0.0022)         &    (0.0018)         &    (0.0021)         &    (0.0018)         &    (0.0021)         \\
\midrule\multicolumn{4}{l}{\textit{Panel C: Interaction of hydrocortisone and coethnicity$^c$}} \\ \quad Interaction effect&     -0.0035         &     -0.0057         &     -0.0042         &-0.0071$^{*}$         &     -0.0052         &-0.0071$^{*}$         \\
                    &    (0.0035)         &    (0.0042)         &    (0.0034)         &    (0.0042)         &    (0.0036)         &    (0.0042)         \\
\midrule Weights    &          No         &         Yes         &          No         &         Yes         &          No         &         Yes         \\
Social Proximity    &          No         &          No         &       Index         &       Index         &        Full         &        Full         \\
\midrule Participants&     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         \\
Decisions per participant&        {42}         &        {42}         &        {46}         &        {46}         &        {54}         &        {54}         \\
Decisions           &    {74,928}         &    {74,928}         &    {82,064}         &    {82,064}         &    {96,336}         &    {96,336}         \\
\bottomrule
\multicolumn{7}{p{\hsize}}{\footnotesize \textit{Notes}: $^a$ The average hydrocortisone effect is calculated as in equation~\eqref{eqn: Calculated Hydro Effect}. $^b$ The average coethnicity effect is calculated as in equation~\eqref{eqn: Calculated Coethnity Effect}. $^c$ The interaction effect is given by $\hat{\beta}_3$ in equation~\eqref{eqn: Main Specification}. All terms are described in the text. In this specification, we control for the interaction of a same-gender and same-age group indicator with hydrocortisone as well as gender, age group and ethnicity fixed effects of both players. This table reports the results of stacking the data of the dictator and trust game (columns (1) and (2)), as well as the social proximity survey index (columns (3) and (4)) or the social proximity survey questions separately (columns (5) and (6)) respectively. Odd-numbered columns use the data as is while even-numbered columns weight all games to have equal influence despite trust game stage 2 having 30 observations per participant, while the dictator game and trust game stage 1 have 6 observations per participant, the social proximity index 4 and the individual questions 12. Standard errors clustered at the participant level are reported in parentheses. Significance is denoted by \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\).}\\
\end{tabular}
}
